States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Students filled two graduated cylinders with 20 milliliters of water. They placed Cylinder A on the windowsill and Cylinder B in a cabinet to determine how much water evaporates in each location. One week later, the students checked to see how much water was in the graduated cylinders. Cylinder A had 11.5 ml of water in it. Cylinder B had 14 ml of water in it. How much more water evaporated from Cylinder A than Cylinder B?
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